[portugal]

major product of this (3S)-4,4-dimethyl-3-hydroxymethyl-6-(2'-propenyl)cyclohexene with hydrogen gas and platinum. What the hell does that strucuture look like man never seen something like that especially this 2' stuff.

could someone kindly show me what this looks like

[Dan]

OK, start by drawing your cyclohexene core and number the carbons 1 to 6 (with the double bond between 1 and 2).

Then add your substituents:

Hydroxymethyl at postition 3 (note the configuration at this position is specified as S)

Two methyl groups at postition 4

A propenyl at postition 6.

Now the propenyl branch is numbered 1' to 3', and the 2'-propenyl indicates that the double bond of the propenyl branch is between 2' and 3'.

[portugal]

(1S)-2,2-dimethyl-1-hydroxymethyl-4-propylcyclohexane

therefore this is the major product based on that structure

[Dan]

I would have thought so, yes.